2017-05-22 Advanced

For Mother's Day, Little Albert wants to show just how much he loves his mom by making a card for her with a big, colorful heart on the front. He gets out his paper, uncaps a marker, and gets to work.

The curve that Little Albert drew is called a limaçon. (The extra loop inside the heart will be invisible to his mom after coloring.) The polar equation for the particular limaçon that he drew is
\[r = 3 - 6 \sin \theta.\]
The area of the region that Little Albert colored in is equal to \(a \pi + \frac{b \sqrt{3}}{c},\) where \(a,\) \(b,\) and \(c\) are positive integers, and \(b\) and \(c\) are coprime.

Two uniform circular disks of masses \(M\) and \(4M\) and radii \(R\) and \(2R,\) respectively, are connected by a massless spring of force constant \(k\) and placed at different heights so that the spring is parallel to the horizontal, as shown above.

Initially, the spring is compressed, and then the system is released from rest. Assuming friction is large enough to prevent slipping, find the angular frequency of oscillation of the system.

If you answer comes in the form of \(\sqrt{ \dfrac{ak}{bM}},\) where \(a\) and \(b\) are coprime positive integers, then enter \(a+b\) as the final answer.